Paster control target

ABSTRACT

A control target for use in indicating annular positioning of the advance end of a web carried by a supply roll including a mounting disc permanently fixed for rotaiton with shaft means employed to removably mount the supply roll and a positioning arm mounted intermediate its ends on the disc for manually induced rotation relative thereto about the axis of the shaft means. The positioning arm carries light reflector and latching or holding devices adjacent its opposite ends; the latching device cooperating with a plurality of annularly spaced holes formed in a face of the disc to adjustably position the reflector device in radial alignment with the advance end of the web.

[451 Nov. 13, 1973 United States Patent [1 1 Swann FASTER CONTROL TARGET Primary Examiner-Richard A. Schacher [75] Attorney-John B. Bean et al.

Inventor: Clifford Swann, Fort Erie, Ontario,

Canada [57] ABSTRACT A control target for use in indicating annular positioning of the advance end of a web carried by a supply roll including amounting disc permanently fixed for rotaiton with shaft means employed to removably mount the supply roll and a positioning arm mounted intermediate its ends on the disc for manually induced rotation relative thereto about the axis of the shaft [73] Assignee: Arcata Graphics, Depew, NY.

[22] Filed: Mar. 12, 1973 [21] Appl. No.: 340,592

[52] US. 242/58.1, 226/100 Int. B651 1 9/18 means. The positioning arm carries light reflector and latching or holding devices adjacent its opposite ends; the latching device cooperating with a plurality of an- References Cited UNITED STATES PATENTS nularly spaced holes formed in a face of the disc to adjustably position the reflector device in radial alignment with the advance end of the web.

2,621,865 12/1952 Wieking.............................242/583 w r. u g i F g n i w a I D 3 s m i a l C 6 8 5 2 4 2 d m o m o H 4 6 9 l 3 6 l 3 2 3 PASTER CONTROL TARGET BACKGROUND OF'TI-IE INVENTION Roll stands of the type employed to supply an endless paper web to a printing press conventionally include a reel shaft on which a pair of multiple arm spiders are secured; each pair of associated spider arms carrying a pair of axially aligned spindle shafts adapted to support opposite ends of a roll of paper to be sup-' plied to the printing press. In operation, when a supply roll nears depletion, the spiders are indexed to move the surface of a new supplyroll into proximity with the web passing from the expiring roll and at an appropriate moment an advanced end of the web carried by the new supply roll is joined to the web passing from the expiring roll by operation of a paster. In that the new supply roll must be driven in order to bring its web up to the speed of the web passing from the expiring roll prior to the pasting operation, it is conventional practice to manually apply a control target in the form of a stick-on reflective tape on the end of the new supply roll to indicate the annular position of the advanced end of its web and to employ an electric eye to sense the control target; the electric eye then serving to operate the paster only when the advance end is properly positioned adjacent the web passing from the expiring roll.

SUMMARY OF THE INVENTION The present invention is directed towards a paster control target which may be permanently mounted in association with the roll stand. The present. target in? cludes a mounting disc permanently fixed for rotation with one of the pair of spindle shafts on which the new supply roll is mounted, and a positioning arm which is rotatably supported on the disc and releasably retained in a desired position by a latch or holding device. After a new supply roll has been .installed, the positioning arm is manually rotated relative to the roll to position a reflector .device in radial alignment with the advance end of theweb carried thereby and then locked or held in position by means of the latch device. Preferably, the latch device is in the form of a spring biased holding pin, which is carried by the positioning arm for receipt within an appropriate; one of-a-v plurality of annularl spaced holes formed in the face of the disc.

By means. of the present invention, it is possible to employ a reflector having greater reflecting capabilities than afforded by stick-on tape type reflectors previously employed, and thereis no possibility of thereflectorbeing accidentally displaced during the operation.

DRAWINGS The nature and mode of the present invention will now be more fully described in the following detailed description taken with the accompanying drawings wherein:

FIG. 1 is an elevational view of a conventional roll stand incorporating control targets formed in accordance with the present invention;

FIG. 2 is an enlarged view of a control target of the present inventiom-and FIG. 3 is a sectional view taken generally along line I 3-3 in FIG. 2.

DETAILED DESCRIPTION To facilitate understanding of the present invention reference is made to FIG. 1, wherein l0 designates a conventional roll stand of the type employed to supply an endless web 12 of paper or other desired material to a printing press or other machine, not shown. Roll stand 10 generally includes a web supply reel device 14 including a reel shaft 16, which is suitably journaled on a framework 18, and a pair of multiple arm spiders 20,

.only one of which is shown in FIG. 1. Spiders 20 are suitably fixed adjacent opposite ends of reel shaft 16 to position spindle shafts 22 carried by their respective arms 24 in axial alignment. Each pair of aligned spindle shafts is adapted to be removably received within opposite ends of a mandrel or tube about which a web of material is pre-wound to form a supply roll. For purposes of reference, 26 designates an expiring roll or one nearing depletion as a result of withdrawal of web l2 therefrom; 28 designates a new supply roll whose'web is to be joined to web 21 when roll 26 is substantially depleted; and 30 designates a reserve new supply roll.

Roll stand 10 would also include a suitable framework mounted web pasting and severing device 32; a new supply roll drive device 34 and a web tension sensing device 36. During normal operation of roll stands of this type, when roll 26 nears completion, reel 14 is indexed in a counter-clockwise direction, as viewed in FIG. 1, to position the surface of new supply roll 28 in close proximity to web 12, and drive 34 is operated to bring the surface of speed of such roll up to that of the web. At an appropriate moment an adhesively coated advance end of the web carried by roll 28 is joined or spliced to web 12 by operation of the paster 32 and that portion of web 12 intermediate the splice and roll 26 is severed. As indicated in FIG. 3, outer ends of the spindle shafts carried on one or both of spiders 20 are conventionally provided with brake sheaves 38 for retarding rotation of thedepleted roll after severing of web 12.

In prior roll stands of the type thus far described, operation or firing of paster 32 is controlled by an electric eye 38,, which is responsive to light reflected from a control target in the formof a stick-on reflective tab, not shown. This reflective tab i s n oramlly applied by a workman to the end ,of each new supply roll at the time that the roll is mounted on the roll stand, and serves to indicatethe annular position of the advance end of the web carried by the new roll. It will be understand that it is conventional practice to place thereflective tab in radial alignment with'the advance end of the web, but that the term radial'alignment as used herein will also be understood to include slight annular offsets from radial alignment where requiredto insure that the pasting operationoccurs only when the advance end is presented to the web passing from roll 26. I

In accordance withthe. present invention, the stickon plastic tape control target of the prior art is replaced by an improved'control target 40, which is permanently affixed one in association with each pair of aligned spindle shafts. Each of targets 40 includes a metal mounting disc .42 having a centrally disposed through bore opening 44, a plurality of threaded through openings 46 adapted to receive threaded bolts 48 for attaching the target-to one of brake sheaves 38 and positioning bore opening 44 in alignment with the rotational axis of the spindle shafts, and a plurality of holes or receiving portions 50, which open through disc front face 52 andare arranged in an annularly spaced relationship concentrically of central opening 44. Each of targets 40 additionally includes a positioning arm or member in the form of a flat, elongated metal bar 54, which is journaled intermediate its ends on a stepped diameter bearing shaft or bolt 56 fixedly clamped within disc bore opening 44, as by a nut 58. The positioning arm carries a reflector 60 and a latching or folding device 62 adjacent its opposite ends. Reflector 60 may be formed of any suitable highly reflective material and secured to the positioning arm, as by a threaded bolt 64. Holding device 62 is best shown in FIG. 3 as including a headed pin 66, which is slideably received within a positioning arm aperture 68 and normally biased by coil spring device 70 towards disc face 52 for seating in one of holes 50.

By viewing FIG. 1, it will be understood that in accordance with the practice of the present invention, a target device 40 is permanently mounted in association with each pair of spindle shafts. Then, after a new supply roll has been installed on any given pair of spindle shafts, latch device 62 of the corresponding target is manually released and positioning arm 54 is manually rotated to position reflector 60 in radial alignment with the advance end of the web carried by the newly installed roll. When the reflector is properly positioned, pin 66 is released and automatically driven by spring 70 into one of holes 50 with which it has been placed in alignment. The latch device thereafter serves to prevent displacement of reflector 60 even though target 40 is subjected to high speed rotation.

We claim:

1. In a roll stand for supplying an endless web of material by pasting an advance end of a web from a new roll onto a web passing from an expiring roll wherein the new roll and expiring roll are carried for rotation by separated shaft means and wherein pasting is effected by a paster whose operation is controlled by a sensing device responsive to light reflected from a target positioned in association with the new roll to indicate the annular position of said advance end, the improvement wherein said target is permanently associated one with each of said shaft means and includes:

a mounting member fixed for rotation with said shaft means;

a positioning member;

a light reflector carried by said positioning member;

latch means carried by said positioning member; and

attaching means for fixing said positioning member to said mounting member for rotation relative thereto about an axis arranged in substantial alignment with the axis of rotation of said shaft means, said reflector being spaced radially from said axes whereby said positioning member may be manually rotated relative to said mounting member to move said reflector along an annular path for positioning in radial alignment with an advance end of a new roll, and said latch means is releasably engageable with said mounting member for releasably retaining said reflector in a position along said path into which it has been moved by said positioning member. i

2. The improvement according to claim 1, wherein said mounting member is formed with a plurality of annularly spaced holes ranged concentrically of said axes, and said latch means includes a pin having an end carried by said positioning member for alignment with successive ones of said holes as said positioning member is rotated relative to said mounting member and spring means for releasably biasing said end of said pin for movement into one of said holes with which it is placed in alignment.

3. The improvement according to claim 2, wherein said positioning member is an elongated bar carrying said reflector and latch means adjacent opposite ends thereof and is fixed to said mounting member adjacent a mid-point thereof.

4. The improvement according to claim 3, wherein said mounting member is in the form of a centrally apertured disc, and said attaching means passes through said central aperture, and said holes are disposed concentrically of said central aperture.

5. The improvement according to claim 1, wherein said mounting member is in the form of a disc having annularly spaced receiving portions arranged concentrically of said axes, said positioning member is fixed centrally of said disc, and said latch means is carried by said positioning memberfor alignment with successive ones of said receiving portions as said positioning member is rotated relative to said disc.

6. The improvement according to claim 5, wherein said positioning member is an elongated bar carrying said reflector and said latch means adjacent opposite ends thereof and fixed to said disc adjacent a mid-point thereof. 

1. In a roll stand for supplying an endless web of material by pasting an advance end of a web from a new roll onto a web passing from an expiring roll wherein the new roll and expiring roll are carried for rotation by separated shaft means and wherein pasting is effected by a paster whose operation is controlled by a sensing device responsive to light reflected from a target positioned in association with the new roll to indicate the annular position of said advance end, the improvement wherein said target is permanently associated one with each of said shaft means and includes: a mounting member fixed for rotation with said shaft means; a positioning member; a light reflector carried by said positioning member; latch means carried by said positioning member; and attaching means for fixing said positioning member to said mounting member for rotation relative thereto about an axis arranged in substantial alignment with the axis of rotation of said shaft means, said reflector being spaced radially from said axes whereby said positioning member may be manually rotated relative to said mounting member to move said reflector along an annular path for positioning in radial alignment with an advance end of a new roll, and said latch means is releasably engageable with said mounting member for releasably retaining said reflector in a position along said path into which it has been moved by said positioning member.
 2. The improvement according to claim 1, wherein said mounting member is formed with a plurality of annularly spaced holes ranged concentrically of said axes, and said latch means includes a pin having an end carried by said positioning member for alignment with successive ones of said holes as said positioning member is rotated relative to said mounting member and spring means for releasably biasing said end of said pin for movement into one of said holes with which it is placed in alignment.
 3. The improvement according to claim 2, wherein said positioning member is an elongated bar carrying said reflector and latch means adjacent opposite ends thereof and is fixed to said mounting member adjacent a mid-point thereof.
 4. The improvement according to claim 3, wherein said mounting member is in the form of a centrally apertured disc, and said attaching means passes through said central aperture, and said holes are disposed concentrically of said central aperture.
 5. The improvement according to claim 1, wherein said mounting member is in the form of a disc having annularly spaced receiving portions arranged concentrically of said axes, said positioning member is fIxed centrally of said disc, and said latch means is carried by said positioning member for alignment with successive ones of said receiving portions as said positioning member is rotated relative to said disc.
 6. The improvement according to claim 5, wherein said positioning member is an elongated bar carrying said reflector and said latch means adjacent opposite ends thereof and fixed to said disc adjacent a mid-point thereof. 